How severe is CVE-2021-41392?

CVE-2021-41392 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-41392 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41392?

CVE-2021-41392 affects Boostnote. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41392?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-41392 published?

CVE-2021-41392 was published on 2021-09-17 and last updated on 2026-06-17.

CVE-2021-41392

CVE-2021-41392 is a critical-severity vulnerability in Boostnote with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Boostnote
Published: 2021-09-17
Last modified: 2026-06-17

Description

static/main-preload.js in Boost Note through 0.22.0 allows remote command execution. A remote attacker may send a crafted IPC message to the exposed vulnerable ipcRenderer IPC interface, which invokes the dangerous openExternal Electron API.

Frequently asked questions

What is CVE-2021-41392?: static/main-preload.js in Boost Note through 0.22.0 allows remote command execution. A remote attacker may send a crafted IPC message to the exposed vulnerable ipcRenderer IPC interface, which invokes the dangerous openExternal Electron API.
How severe is CVE-2021-41392?: CVE-2021-41392 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-41392 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41392?: CVE-2021-41392 affects Boostnote. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41392?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-41392 published?: CVE-2021-41392 was published on 2021-09-17 and last updated on 2026-06-17.

References

https://github.com/BoostIO/BoostNote-App/issues/856

Affected products (1)

cpe:2.3:a:boostnote:boostnote:*:*:*:*:*:*:*:*

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